“Sometimes, official versions of those games on Steam are actually cracked versions, because the piracy community does a better job of maintaining them than one of the biggest video game publishers in the world.”
Ethan Lee keeps about 70 indie games running, Fez and Bastion among them, and has done it quietly for 11 years. His one requirement is a native Linux build, because nobody has to wait on Microsoft to keep it alive. Publishers sell remasters. Lee sells maintenance, and asks developers how anyone will run their game in 50 years. Most have no answer.